Secondhand 850 Hot Rolling Mill
Refurbished 850mm Hot Rolling Mill: Industrial-Grade Strip Production Solution
1. Industrial Capacity & Material Specifications
Production Scale
This hot rolling mill delivers 800,000 tons/year of precision hot-rolled coils – processing 8.2-ton billets into high-tolerance strips for automotive and construction sectors.
Raw Material Standards
| Parameter | Specification |
|---|---|
| Billet Thickness | 165 mm |
| Billet Width | 650 mm (max) |
| Billet Length | 10,000 mm |
| Intermediate Thickness | 28-35 mm |
| Material Grades | Plain carbon steel · Low-alloy steel |
Finished Product Metrics
| Attribute | Range |
|---|---|
| Strip Thickness | 1.6-8 mm |
| Strip Width | 400-650 mm |
| Coil Dimensions | ID Ø520 mm / OD Ø1,600 mm |
| Max Coil Weight | 8.2 tons |
2. Thermo-Mechanical Processing Technology
Multi-Stage Temperature Control
Reheating (1100-1300°C) → Roughing (1050-1150°C) → Finishing (850-950°C) → Laminar Cooling → Coiling (550-680°C)
Precision Control Systems
Dual-Pressure Descaling: 250-bar water jets (pre-roughing + pre-finishing)
Tension Stability: Inter-stand loopers with ±0.25% micro-tension
Adaptive Cooling: 36-zone laminar flow (cooling rate: 18-50°C/sec)
Thickness Control: Hydraulic AGC with 20ms response time
3. Refurbished Mill Technical Architecture
Core Components of This Used Hot Rolling Machine
Rolling Configuration: 6-roughing + 7-finishing stands
Drive Power: 5,500kW AC motors (Siemens/Sinamics platform)
Automation: L2 process control with real-time thickness prediction
Refurbishment Certification
| Component | Reconditioning Standard |
|---|---|
| Work Rolls | Reground to DIN 8601 (±0.003mm runout) |
| Hydraulic Systems | Seal replacement + pressure recalibration |
| Sensors | New infrared pyrometers (±3°C accuracy) |
| Electrical Cabinets | UL-certified rewiring |
4. Economic Advantages vs. New Equipment
| Metric | This Second Hand 850 Hot Rolling | New Equivalent |
|---|---|---|
| Capital Investment | $3.8–4.5M | $9.5–11.2M |
| Installation Timeline | 45 days | 210 days |
| Energy Consumption | 78 kWh/ton | 105 kWh/ton |
| ROI Period | 16 months | 54 months |
| Material Utilization | 98.7% | 96.5% |
5. Verified Production Performance
Industry Application Cases
Automotive Steel: DC04 (2.0×600mm)
→ Yield strength: 180±10 MPa · Elongation: 42%Structural Steel: S275JR (6.0×650mm)
→ Impact toughness: 27J @ -20°CLow-Alloy Steel: 345B (3.5×550mm)
→ Flatness tolerance: ≤3 I-units
6. Technical Support Ecosystem
Pre-Sales Engineering
Material Trials: 300-ton test campaigns with quality certification
Layout Optimization: 3D plant integration modeling
Post-Commissioning Guarantees
| Service | Scope |
|---|---|
| Remote Monitoring | IoT-based vibration/temperature analytics |
| Operator Training | Level 1-3 certification (IATF 16949 standard) |
| Spare Parts | 12-year availability guarantee |
| Warranty | 18-month comprehensive coverage |
